Thank you, Fernando K and Adrian, for your input. Adrian, you are correct that the lock on mine has no filled holes and the existing lock fits snugly. I guess the reason I thought perhaps a conversion is I've seen the 'nipple' cut into old locks and the cap holder on this one possibly looked 'added'. Likewise, the aging on the pistol, with it's wear and patina to the wood, made me suspect older. I guess in leu of this information, this must just be an early percussion pistol, perhaps 1820's?
